Bell Ringer

Quietly come in and begin taking the quiz on

your desk.

Physical & Chemical Changes

MeltingSolid Liquid

H2O H2O

Have you made anything new??

Physical property: observed with the senses; determined without changing the matter to a new substance

physical property

Ask yourself is something NEW made?

Physical property: observed with the senses; determined without changing the matter to a new substance

Melting evaporation

color odor

physical property

density taste

Physical Change: a change in size, shape or state of matter; substance does NOT change identity when it undergoes a physical change

Chemical property: indicates how a substance reacts with something else; matter will be changed into a new substance after the reaction

chemical property

Ask yourself is something NEW made?

Chemical property: indicates how a substance reacts with something else; matter will be changed into a new substance after the reaction

Reacts with water Reacts in the air

chemical property

Reacts with other chemicals

Chemical Change: a change in the physical and chemical properties; to change one

substance into another substance

Penny + Acid??

If you make a new substance and it can’t go back----->

chemical change.

5 Signs of Chemical Reaction

1. Gas given off

2. Light or heat given off

3. Color change

4. Solid Precipitate formed

5. Water is formed